Windows 7 Microsoft Kills Hotmail Hijack Threat

It took Redmond 1 day to kill a threat that allowed users with a Firefox add-on (Tamper Data) to remotely reset the password of a Hotmail account and allowing them to access the outgoing HTTP request, then modify the data.

Remote attackers can bypass the password recovery service to set up a new password and bypass in place protections (token based). The token protection only checks if a value is empty, then blocks or closes the web session. A remote attacker can, for example, bypass the token protection with values “+++)-“. Successful exploitation results in unauthorized MSN or Hotmail account access.

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Microsoft was notified April 20, 2012, applied the fix April 21, 2012, then publicized it April 27, 2012